net: axienet: Support for RGMII

This patch adds support for the RGMII. The h/w configuration
parameter C_PHY_TYPE, which represents the interface configured in
the design, is used to differentiate various interfaces supported
by AXI Ethernet.

Signed-off-by: Srikanth Thokala <sthokal@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/xilinx/xilinx_axienet_main.c

@@ -925,9 +925,16 @@ static int axienet_open(struct net_device *ndev)
 		return ret;
 
 	if (lp->phy_node) {
-		lp->phy_dev = of_phy_connect(lp->ndev, lp->phy_node,
+		if (lp->phy_type == XAE_PHY_TYPE_GMII) {
+			lp->phy_dev = of_phy_connect(lp->ndev, lp->phy_node,
 					     axienet_adjust_link, 0,
 					     PHY_INTERFACE_MODE_GMII);
+		} else if (lp->phy_type == XAE_PHY_TYPE_RGMII_2_0) {
+			lp->phy_dev = of_phy_connect(lp->ndev, lp->phy_node,
+					     axienet_adjust_link, 0,
+					     PHY_INTERFACE_MODE_RGMII_ID);
+		}
+
 		if (!lp->phy_dev) {
 			dev_err(lp->dev, "of_phy_connect() failed\n");
 			return -ENODEV;